Merge branch 'master' into dist-per-table-monitor-settings

2024-11-21 15:12:02 +00:00 · 2021-07-16 13:32:40 +00:00 · 2021-07-16 13:32:40 +00:00 · 126a2d7ad1
commit 126a2d7ad1
parent a3653bd665 181f20cfe1
46 changed files with 584 additions and 128 deletions
--- a/contrib/rocksdb
+++ b/contrib/rocksdb
@ -1 +1 @@
-Subproject commit 07c77549a20b63ff6981b400085eba36bb5c80c4
+Subproject commit 6ff0adefdc84dac44e78804f7ca4122fe992cf8d
--- a/docs/en/engines/table-engines/mergetree-family/mergetree.md
+++ b/docs/en/engines/table-engines/mergetree-family/mergetree.md
@ -76,7 +76,7 @@ For a description of parameters, see the [CREATE query description](../../../sql

 -   `SAMPLE BY` — An expression for sampling. Optional.

-    If a sampling expression is used, the primary key must contain it. Example: `SAMPLE BY intHash32(UserID) ORDER BY (CounterID, EventDate, intHash32(UserID))`.
+    If a sampling expression is used, the primary key must contain it. The result of sampling expression must be unsigned integer. Example: `SAMPLE BY intHash32(UserID) ORDER BY (CounterID, EventDate, intHash32(UserID))`.

 -   `TTL` — A list of rules specifying storage duration of rows and defining logic of automatic parts movement [between disks and volumes](#table_engine-mergetree-multiple-volumes). Optional.

--- a/docs/en/interfaces/formats.md
+++ b/docs/en/interfaces/formats.md
@ -1130,17 +1130,18 @@ The table below shows supported data types and how they match ClickHouse [data t
 | `boolean`, `int`, `long`, `float`, `double` | [Int64](../sql-reference/data-types/int-uint.md), [UInt64](../sql-reference/data-types/int-uint.md)                   | `long`                       |
 | `boolean`, `int`, `long`, `float`, `double` | [Float32](../sql-reference/data-types/float.md)                                                                       | `float`                      |
 | `boolean`, `int`, `long`, `float`, `double` | [Float64](../sql-reference/data-types/float.md)                                                                       | `double`                     |
-| `bytes`, `string`, `fixed`, `enum`          | [String](../sql-reference/data-types/string.md)                                                                       | `bytes`                      |
+| `bytes`, `string`, `fixed`, `enum`          | [String](../sql-reference/data-types/string.md)                                                                       | `bytes` or `string` \*       |
 | `bytes`, `string`, `fixed`                  | [FixedString(N)](../sql-reference/data-types/fixedstring.md)                                                          | `fixed(N)`                   |
 | `enum`                                      | [Enum(8\|16)](../sql-reference/data-types/enum.md)                                                                    | `enum`                       |
 | `array(T)`                                  | [Array(T)](../sql-reference/data-types/array.md)                                                                      | `array(T)`                   |
 | `union(null, T)`, `union(T, null)`          | [Nullable(T)](../sql-reference/data-types/date.md)                                                                    | `union(null, T)`             |
 | `null`                                      | [Nullable(Nothing)](../sql-reference/data-types/special-data-types/nothing.md)                                        | `null`                       |
-| `int (date)` \*                             | [Date](../sql-reference/data-types/date.md)                                                                           | `int (date)` \*              |
-| `long (timestamp-millis)` \*                | [DateTime64(3)](../sql-reference/data-types/datetime.md)                                                              | `long (timestamp-millis)` \* |
-| `long (timestamp-micros)` \*                | [DateTime64(6)](../sql-reference/data-types/datetime.md)                                                              | `long (timestamp-micros)` \* |
+| `int (date)` \**                            | [Date](../sql-reference/data-types/date.md)                                                                           | `int (date)` \**             |
+| `long (timestamp-millis)` \**               | [DateTime64(3)](../sql-reference/data-types/datetime.md)                                                              | `long (timestamp-millis)` \* |
+| `long (timestamp-micros)` \**               | [DateTime64(6)](../sql-reference/data-types/datetime.md)                                                              | `long (timestamp-micros)` \* |

-\* [Avro logical types](https://avro.apache.org/docs/current/spec.html#Logical+Types)
+\* `bytes` is default, controlled by [output_format_avro_string_column_pattern](../operations/settings/settings.md#settings-output_format_avro_string_column_pattern)
+\** [Avro logical types](https://avro.apache.org/docs/current/spec.html#Logical+Types)

 Unsupported Avro data types: `record` (non-root), `map`

--- a/docs/en/operations/settings/merge-tree-settings.md
+++ b/docs/en/operations/settings/merge-tree-settings.md
@ -278,4 +278,16 @@ Possible values:

 Default value: `0`.

+## check_sample_column_is_correct {#check_sample_column_is_correct}
+
+Enables to check column for sampling or sampling expression is correct at table creation.
+
+Possible values:
+
+-   true  — Check column or sampling expression is correct at table creation.
+-   false — Do not check column or sampling expression is correct at table creation.
+
+Default value: `true`.
+
+By default, the ClickHouse server check column for sampling or sampling expression at table creation. If you already had tables with incorrect sampling expression, set value `false` to make ClickHouse server do not raise exception when ClickHouse server is starting.
 [Original article](https://clickhouse.tech/docs/en/operations/settings/merge_tree_settings/) <!--hide-->
--- a/docs/en/operations/settings/settings.md
+++ b/docs/en/operations/settings/settings.md
@ -1969,6 +1969,13 @@ Possible values: 32 (32 bytes) - 1073741824 (1 GiB)

 Default value: 32768 (32 KiB)

+## output_format_avro_string_column_pattern {#output_format_avro_string_column_pattern}
+
+Regexp of column names of type String to output as Avro `string` (default is `bytes`).
+RE2 syntax is supported.
+
+Type: string
+
 ## format_avro_schema_registry_url {#format_avro_schema_registry_url}

 Sets [Confluent Schema Registry](https://docs.confluent.io/current/schema-registry/index.html) URL to use with [AvroConfluent](../../interfaces/formats.md#data-format-avro-confluent) format.
--- a/docs/zh/engines/database-engines/atomic.md
+++ b/docs/zh/engines/database-engines/atomic.md
@ -6,12 +6,12 @@ toc_title: Atomic

 # Atomic {#atomic}

-It is supports non-blocking `DROP` and `RENAME TABLE` queries and atomic `EXCHANGE TABLES t1 AND t2` queries. Atomic database engine is used by default.
+它支持非阻塞 DROP 和 RENAME TABLE 查询以及原子 EXCHANGE TABLES t1 AND t2 查询。默认情况下使用Atomic数据库引擎。

-## Creating a Database {#creating-a-database}
+## 创建数据库 {#creating-a-database}

 ```sql
 CREATE DATABASE test ENGINE = Atomic;
 ```

-[Original article](https://clickhouse.tech/docs/en/engines/database_engines/atomic/) <!--hide-->
+[原文](https://clickhouse.tech/docs/en/engines/database_engines/atomic/) <!--hide-->
--- a/docs/zh/engines/table-engines/mergetree-family/collapsingmergetree.md
+++ b/docs/zh/engines/table-engines/mergetree-family/collapsingmergetree.md
@ -1,4 +1,4 @@
-# 折叠树 {#table_engine-collapsingmergetree}
+# CollapsingMergeTree {#table_engine-collapsingmergetree}

 该引擎继承于 [MergeTree](mergetree.md)，并在数据块合并算法中添加了折叠行的逻辑。

@ -203,4 +203,4 @@ SELECT * FROM UAct FINAL

 这种查询数据的方法是非常低效的。不要在大表中使用它。

-[来源文章](https://clickhouse.tech/docs/en/operations/table_engines/collapsingmergetree/) <!--hide-->
+[原文](https://clickhouse.tech/docs/en/operations/table_engines/collapsingmergetree/) <!--hide-->
--- a/docs/zh/engines/table-engines/mergetree-family/versionedcollapsingmergetree.md
+++ b/docs/zh/engines/table-engines/mergetree-family/versionedcollapsingmergetree.md
@ -3,7 +3,7 @@ toc_priority: 37
 toc_title: "版本折叠MergeTree"
 ---

-# 版本折叠MergeTree {#versionedcollapsingmergetree}
+# VersionedCollapsingMergeTree {#versionedcollapsingmergetree}

 这个引擎:

--- a/docs/zh/interfaces/tcp.md
+++ b/docs/zh/interfaces/tcp.md
@ -5,6 +5,6 @@ toc_title: 原生接口(TCP)

 # 原生接口（TCP）{#native-interface-tcp}

-原生接口用于[命令行客户端](cli.md)，用于分布式查询处理期间的服务器间通信，以及其他C++程序。可惜的是，原生的ClickHouse协议还没有正式的规范，但它可以从ClickHouse[源代码](https://github.com/ClickHouse/ClickHouse/tree/master/src/Client)通过拦截和分析TCP流量进行反向工程。
+原生接口协议用于[命令行客户端](cli.md)，用于分布式查询处理期间的服务器间通信，以及其他C++ 程序。不幸的是，原生ClickHouse协议还没有正式的规范，但它可以从ClickHouse源代码[从这里开始](https://github.com/ClickHouse/ClickHouse/tree/master/src/Client)或通过拦截和分析TCP流量进行逆向工程。

-[来源文章](https://clickhouse.tech/docs/zh/interfaces/tcp/) <!--hide-->
+[原文](https://clickhouse.tech/docs/en/interfaces/tcp/) <!--hide-->
--- a/docs/zh/operations/index.md
+++ b/docs/zh/operations/index.md
@ -5,9 +5,21 @@ toc_title: "操作"

 # 操作 {#operations}

-Clickhouse运维手册主要包含下面几部分：
+ClickHouse操作手册由以下主要部分组成：

- 安装要求
+-   [安装要求](../operations/requirements.md)
+-   [监控](../operations/monitoring.md)
+-   [故障排除](../operations/troubleshooting.md)
+-   [使用建议](../operations/tips.md)
+-   [更新程序](../operations/update.md)
+-   [访问权限](../operations/access-rights.md)
+-   [数据备份](../operations/backup.md)
+-   [配置文件](../operations/configuration-files.md)
+-   [配额](../operations/quotas.md)
+-   [系统表](../operations/system-tables/index.md)
+-   [服务器配置参数](../operations/server-configuration-parameters/index.md)
+-   [如何用ClickHouse测试你的硬件](../operations/performance-test.md)
+-   [设置](../operations/settings/index.md)
+-   [实用工具](../operations/utilities/index.md)

-
-[原始文章](https://clickhouse.tech/docs/en/operations/) <!--hide-->
+[原文](https://clickhouse.tech/docs/en/operations/) <!--hide-->
--- a/programs/server/play.html
+++ b/programs/server/play.html
@ -613,10 +613,16 @@
    }

    /// Huge JS libraries should be loaded only if needed.
-    function loadJS(src) {
+    function loadJS(src, integrity) {
        return new Promise((resolve, reject) => {
            const script = document.createElement('script');
            script.src = src;
+            if (integrity) {
+                script.crossOrigin = 'anonymous';
+                script.integrity = integrity;
+            } else {
+                console.warn('no integrity for', src)
+            }
            script.addEventListener('load', function() { resolve(true); });
            document.head.appendChild(script);
        });
@ -627,10 +633,14 @@
        if (load_dagre_promise) { return load_dagre_promise; }

        load_dagre_promise = Promise.all([
-            loadJS('https://dagrejs.github.io/project/dagre/v0.8.5/dagre.min.js'),
-            loadJS('https://dagrejs.github.io/project/graphlib-dot/v0.6.4/graphlib-dot.min.js'),
-            loadJS('https://dagrejs.github.io/project/dagre-d3/v0.6.4/dagre-d3.min.js'),
-            loadJS('https://cdn.jsdelivr.net/npm/d3@7.0.0'),
+            loadJS('https://dagrejs.github.io/project/dagre/v0.8.5/dagre.min.js',
+                   'sha384-2IH3T69EIKYC4c+RXZifZRvaH5SRUdacJW7j6HtE5rQbvLhKKdawxq6vpIzJ7j9M'),
+            loadJS('https://dagrejs.github.io/project/graphlib-dot/v0.6.4/graphlib-dot.min.js',
+                   'sha384-Q7oatU+b+y0oTkSoiRH9wTLH6sROySROCILZso/AbMMm9uKeq++r8ujD4l4f+CWj'),
+            loadJS('https://dagrejs.github.io/project/dagre-d3/v0.6.4/dagre-d3.min.js',
+                   'sha384-9N1ty7Yz7VKL3aJbOk+8ParYNW8G5W+MvxEfFL9G7CRYPmkHI9gJqyAfSI/8190W'),
+            loadJS('https://cdn.jsdelivr.net/npm/d3@7.0.0',
+                   'sha384-S+Kf0r6YzKIhKA8d1k2/xtYv+j0xYUU3E7+5YLrcPVab6hBh/r1J6cq90OXhw80u'),
        ]);

        return load_dagre_promise;
--- a/src/Access/AccessControlManager.cpp
+++ b/src/Access/AccessControlManager.cpp
@ -64,7 +64,12 @@ public:
        std::lock_guard lock{mutex};
        auto x = cache.get(params);
        if (x)
-            return *x;
+        {
+            if ((*x)->getUser())
+                return *x;
+            /// No user, probably the user has been dropped while it was in the cache.
+            cache.remove(params);
+        }
        auto res = std::shared_ptr<ContextAccess>(new ContextAccess(manager, params));
        cache.add(params, res);
        return res;
--- a/src/Access/AccessRights.cpp
+++ b/src/Access/AccessRights.cpp
@ -655,7 +655,7 @@ private:
            for (auto & [lhs_childname, lhs_child] : *children)
            {
                if (!rhs.tryGetChild(lhs_childname))
-                    lhs_child.flags |= rhs.flags & lhs_child.getAllGrantableFlags();
+                    lhs_child.addGrantsRec(rhs.flags);
            }
        }
    }
@ -673,7 +673,7 @@ private:
            for (auto & [lhs_childname, lhs_child] : *children)
            {
                if (!rhs.tryGetChild(lhs_childname))
-                    lhs_child.flags &= rhs.flags;
+                    lhs_child.removeGrantsRec(~rhs.flags);
            }
        }
    }
@ -1041,17 +1041,15 @@ void AccessRights::makeIntersection(const AccessRights & other)
    auto helper = [](std::unique_ptr<Node> & root_node, const std::unique_ptr<Node> & other_root_node)
    {
        if (!root_node)
+            return;
+        if (!other_root_node)
        {
-            if (other_root_node)
-                root_node = std::make_unique<Node>(*other_root_node);
+            root_node = nullptr;
            return;
        }
-        if (other_root_node)
-        {
-            root_node->makeIntersection(*other_root_node);
-            if (!root_node->flags && !root_node->children)
-                root_node = nullptr;
-        }
+        root_node->makeIntersection(*other_root_node);
+        if (!root_node->flags && !root_node->children)
+            root_node = nullptr;
    };
    helper(root, other.root);
    helper(root_with_grant_option, other.root_with_grant_option);
--- a/src/Access/ContextAccess.cpp
+++ b/src/Access/ContextAccess.cpp
@ -163,11 +163,10 @@ void ContextAccess::setUser(const UserPtr & user_) const
    if (!user)
    {
        /// User has been dropped.
-        auto nothing_granted = std::make_shared<AccessRights>();
-        access = nothing_granted;
-        access_with_implicit = nothing_granted;
        subscription_for_user_change = {};
        subscription_for_roles_changes = {};
+        access = nullptr;
+        access_with_implicit = nullptr;
        enabled_roles = nullptr;
        roles_info = nullptr;
        enabled_row_policies = nullptr;
@ -252,32 +251,45 @@ String ContextAccess::getUserName() const
 std::shared_ptr<const EnabledRolesInfo> ContextAccess::getRolesInfo() const
 {
    std::lock_guard lock{mutex};
-    return roles_info;
+    if (roles_info)
+        return roles_info;
+    static const auto no_roles = std::make_shared<EnabledRolesInfo>();
+    return no_roles;
 }

 std::shared_ptr<const EnabledRowPolicies> ContextAccess::getEnabledRowPolicies() const
 {
    std::lock_guard lock{mutex};
-    return enabled_row_policies;
+    if (enabled_row_policies)
+        return enabled_row_policies;
+    static const auto no_row_policies = std::make_shared<EnabledRowPolicies>();
+    return no_row_policies;
 }

 ASTPtr ContextAccess::getRowPolicyCondition(const String & database, const String & table_name, RowPolicy::ConditionType index, const ASTPtr & extra_condition) const
 {
    std::lock_guard lock{mutex};
-    return enabled_row_policies ? enabled_row_policies->getCondition(database, table_name, index, extra_condition) : nullptr;
+    if (enabled_row_policies)
+        return enabled_row_policies->getCondition(database, table_name, index, extra_condition);
+    return nullptr;
 }

 std::shared_ptr<const EnabledQuota> ContextAccess::getQuota() const
 {
    std::lock_guard lock{mutex};
-    return enabled_quota;
+    if (enabled_quota)
+        return enabled_quota;
+    static const auto unlimited_quota = EnabledQuota::getUnlimitedQuota();
+    return unlimited_quota;
 }


 std::optional<QuotaUsage> ContextAccess::getQuotaUsage() const
 {
    std::lock_guard lock{mutex};
-    return enabled_quota ? enabled_quota->getUsage() : std::optional<QuotaUsage>{};
+    if (enabled_quota)
+        return enabled_quota->getUsage();
+    return {};
 }


@ -288,7 +300,7 @@ std::shared_ptr<const ContextAccess> ContextAccess::getFullAccess()
        auto full_access = std::shared_ptr<ContextAccess>(new ContextAccess);
        full_access->is_full_access = true;
        full_access->access = std::make_shared<AccessRights>(AccessRights::getFullAccess());
-        full_access->enabled_quota = EnabledQuota::getUnlimitedQuota();
+        full_access->access_with_implicit = std::make_shared<AccessRights>(addImplicitAccessRights(*full_access->access));
        return full_access;
    }();
    return res;
@ -298,28 +310,40 @@ std::shared_ptr<const ContextAccess> ContextAccess::getFullAccess()
 std::shared_ptr<const Settings> ContextAccess::getDefaultSettings() const
 {
    std::lock_guard lock{mutex};
-    return enabled_settings ? enabled_settings->getSettings() : nullptr;
+    if (enabled_settings)
+        return enabled_settings->getSettings();
+    static const auto everything_by_default = std::make_shared<Settings>();
+    return everything_by_default;
 }


 std::shared_ptr<const SettingsConstraints> ContextAccess::getSettingsConstraints() const
 {
    std::lock_guard lock{mutex};
-    return enabled_settings ? enabled_settings->getConstraints() : nullptr;
+    if (enabled_settings)
+        return enabled_settings->getConstraints();
+    static const auto no_constraints = std::make_shared<SettingsConstraints>();
+    return no_constraints;
 }


 std::shared_ptr<const AccessRights> ContextAccess::getAccessRights() const
 {
    std::lock_guard lock{mutex};
-    return access;
+    if (access)
+        return access;
+    static const auto nothing_granted = std::make_shared<AccessRights>();
+    return nothing_granted;
 }


 std::shared_ptr<const AccessRights> ContextAccess::getAccessRightsWithImplicit() const
 {
    std::lock_guard lock{mutex};
-    return access_with_implicit;
+    if (access_with_implicit)
+        return access_with_implicit;
+    static const auto nothing_granted = std::make_shared<AccessRights>();
+    return nothing_granted;
 }


@ -551,7 +575,7 @@ bool ContextAccess::checkAdminOptionImplHelper(const Container & role_ids, const
    for (auto it = std::begin(role_ids); it != std::end(role_ids); ++it, ++i)
    {
        const UUID & role_id = *it;
-        if (info && info->enabled_roles_with_admin_option.count(role_id))
+        if (info->enabled_roles_with_admin_option.count(role_id))
            continue;

        if (throw_if_denied)
@ -560,7 +584,7 @@ bool ContextAccess::checkAdminOptionImplHelper(const Container & role_ids, const
            if (!role_name)
                role_name = "ID {" + toString(role_id) + "}";

-            if (info && info->enabled_roles.count(role_id))
+            if (info->enabled_roles.count(role_id))
                show_error("Not enough privileges. "
                           "Role " + backQuote(*role_name) + " is granted, but without ADMIN option. "
                           "To execute this query it's necessary to have the role " + backQuoteIfNeed(*role_name) + " granted with ADMIN option.",
--- a/src/Access/ContextAccess.h
+++ b/src/Access/ContextAccess.h
@ -71,11 +71,9 @@ public:
    String getUserName() const;

    /// Returns information about current and enabled roles.
-    /// The function can return nullptr.
    std::shared_ptr<const EnabledRolesInfo> getRolesInfo() const;

    /// Returns information about enabled row policies.
-    /// The function can return nullptr.
    std::shared_ptr<const EnabledRowPolicies> getEnabledRowPolicies() const;

    /// Returns the row policy filter for a specified table.
@ -83,16 +81,13 @@ public:
    ASTPtr getRowPolicyCondition(const String & database, const String & table_name, RowPolicy::ConditionType index, const ASTPtr & extra_condition = nullptr) const;

    /// Returns the quota to track resource consumption.
-    /// The function returns nullptr if no tracking or limitation is needed.
    std::shared_ptr<const EnabledQuota> getQuota() const;
    std::optional<QuotaUsage> getQuotaUsage() const;

    /// Returns the default settings, i.e. the settings to apply on user's login.
-    /// The function returns nullptr if it's no need to apply settings.
    std::shared_ptr<const Settings> getDefaultSettings() const;

    /// Returns the settings' constraints.
-    /// The function returns nullptr if there are no constraints.
    std::shared_ptr<const SettingsConstraints> getSettingsConstraints() const;

    /// Returns the current access rights.
--- a/src/Access/EnabledRowPolicies.cpp
+++ b/src/Access/EnabledRowPolicies.cpp
@ -12,8 +12,11 @@ size_t EnabledRowPolicies::Hash::operator()(const MixedConditionKey & key) const
 }


-EnabledRowPolicies::EnabledRowPolicies(const Params & params_)
-    : params(params_)
+EnabledRowPolicies::EnabledRowPolicies() : params()
+{
+}
+
+EnabledRowPolicies::EnabledRowPolicies(const Params & params_) : params(params_)
 {
 }

--- a/src/Access/EnabledRowPolicies.h
+++ b/src/Access/EnabledRowPolicies.h
@ -32,6 +32,7 @@ public:
        friend bool operator >=(const Params & lhs, const Params & rhs) { return !(lhs < rhs); }
    };

+    EnabledRowPolicies();
    ~EnabledRowPolicies();

    using ConditionType = RowPolicy::ConditionType;
--- a/src/Access/SettingsConstraints.cpp
+++ b/src/Access/SettingsConstraints.cpp
@ -18,6 +18,8 @@ namespace ErrorCodes
 }


+SettingsConstraints::SettingsConstraints() = default;
+
 SettingsConstraints::SettingsConstraints(const AccessControlManager & manager_) : manager(&manager_)
 {
 }
@ -199,10 +201,13 @@ bool SettingsConstraints::checkImpl(const Settings & current_settings, SettingCh
        }
    };

-    if (reaction == THROW_ON_VIOLATION)
-        manager->checkSettingNameIsAllowed(setting_name);
-    else if (!manager->isSettingNameAllowed(setting_name))
-        return false;
+    if (manager)
+    {
+        if (reaction == THROW_ON_VIOLATION)
+            manager->checkSettingNameIsAllowed(setting_name);
+        else if (!manager->isSettingNameAllowed(setting_name))
+            return false;
+    }

    Field current_value, new_value;
    if (current_settings.tryGet(setting_name, current_value))
--- a/src/Access/SettingsConstraints.h
+++ b/src/Access/SettingsConstraints.h
@ -51,6 +51,7 @@ class AccessControlManager;
 class SettingsConstraints
 {
 public:
+    SettingsConstraints();
    SettingsConstraints(const AccessControlManager & manager_);
    SettingsConstraints(const SettingsConstraints & src);
    SettingsConstraints & operator =(const SettingsConstraints & src);
--- a/src/Access/tests/gtest_access_rights_ops.cpp
+++ b/src/Access/tests/gtest_access_rights_ops.cpp
@ -0,0 +1,94 @@
+#include <gtest/gtest.h>
+#include <Access/AccessRights.h>
+
+using namespace DB;
+
+
+TEST(AccessRights, Union)
+{
+    AccessRights lhs, rhs;
+    lhs.grant(AccessType::CREATE_TABLE, "db1", "tb1");
+    rhs.grant(AccessType::SELECT, "db2");
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT CREATE TABLE ON db1.tb1, GRANT SELECT ON db2.*");
+
+    lhs.clear();
+    rhs.clear();
+    rhs.grant(AccessType::SELECT, "db2");
+    lhs.grant(AccessType::CREATE_TABLE, "db1", "tb1");
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT CREATE TABLE ON db1.tb1, GRANT SELECT ON db2.*");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT);
+    rhs.grant(AccessType::SELECT, "db1", "tb1");
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT ON *.*");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col1", "col2"});
+    rhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col2", "col3"});
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT(col1, col2, col3) ON db1.tb1");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col1", "col2"});
+    rhs.grantWithGrantOption(AccessType::SELECT, "db1", "tb1", Strings{"col2", "col3"});
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT(col1) ON db1.tb1, GRANT SELECT(col2, col3) ON db1.tb1 WITH GRANT OPTION");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::INSERT);
+    rhs.grant(AccessType::ALL, "db1");
+    lhs.makeUnion(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT INSERT ON *.*, GRANT SHOW, SELECT, ALTER, CREATE DATABASE, CREATE TABLE, CREATE VIEW, CREATE DICTIONARY, DROP, TRUNCATE, OPTIMIZE, SYSTEM MERGES, SYSTEM TTL MERGES, SYSTEM FETCHES, SYSTEM MOVES, SYSTEM SENDS, SYSTEM REPLICATION QUEUES, SYSTEM DROP REPLICA, SYSTEM SYNC REPLICA, SYSTEM RESTART REPLICA, SYSTEM RESTORE REPLICA, SYSTEM FLUSH DISTRIBUTED, dictGet ON db1.*");
+}
+
+
+TEST(AccessRights, Intersection)
+{
+    AccessRights lhs, rhs;
+    lhs.grant(AccessType::CREATE_TABLE, "db1", "tb1");
+    rhs.grant(AccessType::SELECT, "db2");
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT USAGE ON *.*");
+
+    lhs.clear();
+    rhs.clear();
+    lhs.grant(AccessType::SELECT, "db2");
+    rhs.grant(AccessType::CREATE_TABLE, "db1", "tb1");
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT USAGE ON *.*");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT);
+    rhs.grant(AccessType::SELECT, "db1", "tb1");
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT ON db1.tb1");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col1", "col2"});
+    rhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col2", "col3"});
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT(col2) ON db1.tb1");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::SELECT, "db1", "tb1", Strings{"col1", "col2"});
+    rhs.grantWithGrantOption(AccessType::SELECT, "db1", "tb1", Strings{"col2", "col3"});
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT SELECT(col2) ON db1.tb1");
+
+    lhs = {};
+    rhs = {};
+    lhs.grant(AccessType::INSERT);
+    rhs.grant(AccessType::ALL, "db1");
+    lhs.makeIntersection(rhs);
+    ASSERT_EQ(lhs.toString(), "GRANT INSERT ON db1.*");
+}
--- a/src/Common/DNSResolver.cpp
+++ b/src/Common/DNSResolver.cpp
@ -109,11 +109,23 @@ static DNSResolver::IPAddresses resolveIPAddressImpl(const std::string & host)
    /// It should not affect client address checking, since client cannot connect from IPv6 address
    /// if server has no IPv6 addresses.
    flags |= Poco::Net::DNS::DNS_HINT_AI_ADDRCONFIG;
+
+    DNSResolver::IPAddresses addresses;
+
+    try
+    {
 #if defined(ARCADIA_BUILD)
-    auto addresses = Poco::Net::DNS::hostByName(host, &Poco::Net::DNS::DEFAULT_DNS_TIMEOUT, flags).addresses();
+        addresses = Poco::Net::DNS::hostByName(host, &Poco::Net::DNS::DEFAULT_DNS_TIMEOUT, flags).addresses();
 #else
-    auto addresses = Poco::Net::DNS::hostByName(host, flags).addresses();
+        addresses = Poco::Net::DNS::hostByName(host, flags).addresses();
 #endif
+    }
+    catch (const Poco::Net::DNSException & e)
+    {
+        LOG_ERROR(&Poco::Logger::get("DNSResolver"), "Cannot resolve host ({}), error {}: {}.", host, e.code(), e.message());
+        addresses.clear();
+    }
+
    if (addresses.empty())
        throw Exception("Not found address of host: " + host, ErrorCodes::DNS_ERROR);

--- a/src/Core/Block.cpp
+++ b/src/Core/Block.cpp
@ -375,9 +375,13 @@ void Block::setColumn(size_t position, ColumnWithTypeAndName && column)
        throw Exception(ErrorCodes::POSITION_OUT_OF_BOUND, "Position {} out of bound in Block::setColumn(), max position {}",
                        position, toString(data.size()));

-    data[position].name = std::move(column.name);
-    data[position].type = std::move(column.type);
-    data[position].column = std::move(column.column);
+    if (data[position].name != column.name)
+    {
+        index_by_name.erase(data[position].name);
+        index_by_name.emplace(column.name, position);
+    }
+
+    data[position] = std::move(column);
 }


--- a/src/Core/Settings.h
+++ b/src/Core/Settings.h
@ -526,6 +526,7 @@ class IColumn;
    M(Bool, input_format_values_accurate_types_of_literals, true, "For Values format: when parsing and interpreting expressions using template, check actual type of literal to avoid possible overflow and precision issues.", 0) \
    M(Bool, input_format_avro_allow_missing_fields, false, "For Avro/AvroConfluent format: when field is not found in schema use default value instead of error", 0) \
    M(URI, format_avro_schema_registry_url, "", "For AvroConfluent format: Confluent Schema Registry URL.", 0) \
+    M(String, output_format_avro_string_column_pattern, "", "For Avro format: regexp of String columns to select as AVRO string.", 0) \
    \
    M(Bool, output_format_json_quote_64bit_integers, true, "Controls quoting of 64-bit integers in JSON output format.", 0) \
    \
--- a/src/Databases/SQLite/SQLiteUtils.h
+++ b/src/Databases/SQLite/SQLiteUtils.h
@ -7,7 +7,7 @@
 #if USE_SQLITE
 #include <Core/Types.h>
 #include <Interpreters/Context.h>
-#include <sqlite3.h>
+#include <sqlite3.h> // Y_IGNORE


 namespace DB
--- a/src/Formats/FormatFactory.cpp
+++ b/src/Formats/FormatFactory.cpp
@ -60,6 +60,7 @@ FormatSettings getFormatSettings(ContextPtr context, const Settings & settings)
    format_settings.avro.output_codec = settings.output_format_avro_codec;
    format_settings.avro.output_sync_interval = settings.output_format_avro_sync_interval;
    format_settings.avro.schema_registry_url = settings.format_avro_schema_registry_url.toString();
+    format_settings.avro.string_column_pattern = settings.output_format_avro_string_column_pattern.toString();
    format_settings.csv.allow_double_quotes = settings.format_csv_allow_double_quotes;
    format_settings.csv.allow_single_quotes = settings.format_csv_allow_single_quotes;
    format_settings.csv.crlf_end_of_line = settings.output_format_csv_crlf_end_of_line;
--- a/src/Formats/FormatSettings.h
+++ b/src/Formats/FormatSettings.h
@ -61,6 +61,7 @@ struct FormatSettings
        String output_codec;
        UInt64 output_sync_interval = 16 * 1024;
        bool allow_missing_fields = false;
+        String string_column_pattern;
    } avro;

    struct CSV
@ -169,4 +170,3 @@ struct FormatSettings
 };

 }
-
--- a/src/Interpreters/AsynchronousMetrics.cpp
+++ b/src/Interpreters/AsynchronousMetrics.cpp
@ -546,13 +546,16 @@ void AsynchronousMetrics::update(std::chrono::system_clock::time_point update_ti
            Int64 peak = total_memory_tracker.getPeak();
            Int64 new_amount = data.resident;

-            LOG_DEBUG(&Poco::Logger::get("AsynchronousMetrics"),
-                "MemoryTracking: was {}, peak {}, will set to {} (RSS), difference: {}",
-                ReadableSize(amount),
-                ReadableSize(peak),
-                ReadableSize(new_amount),
-                ReadableSize(new_amount - amount)
-            );
+            Int64 difference = new_amount - amount;
+
+            /// Log only if difference is high. This is for convenience. The threshold is arbitrary.
+            if (difference >= 1048576 || difference <= -1048576)
+                LOG_TRACE(&Poco::Logger::get("AsynchronousMetrics"),
+                    "MemoryTracking: was {}, peak {}, will set to {} (RSS), difference: {}",
+                    ReadableSize(amount),
+                    ReadableSize(peak),
+                    ReadableSize(new_amount),
+                    ReadableSize(difference));

            total_memory_tracker.set(new_amount);
            CurrentMetrics::set(CurrentMetrics::MemoryTracking, new_amount);
--- a/src/Interpreters/Context.cpp
+++ b/src/Interpreters/Context.cpp
@ -1198,26 +1198,22 @@ void Context::applySettingsChanges(const SettingsChanges & changes)

 void Context::checkSettingsConstraints(const SettingChange & change) const
 {
-    if (auto settings_constraints = getSettingsConstraints())
-        settings_constraints->check(settings, change);
+    getSettingsConstraints()->check(settings, change);
 }

 void Context::checkSettingsConstraints(const SettingsChanges & changes) const
 {
-    if (auto settings_constraints = getSettingsConstraints())
-        settings_constraints->check(settings, changes);
+    getSettingsConstraints()->check(settings, changes);
 }

 void Context::checkSettingsConstraints(SettingsChanges & changes) const
 {
-    if (auto settings_constraints = getSettingsConstraints())
-        settings_constraints->check(settings, changes);
+    getSettingsConstraints()->check(settings, changes);
 }

 void Context::clampToSettingsConstraints(SettingsChanges & changes) const
 {
-    if (auto settings_constraints = getSettingsConstraints())
-        settings_constraints->clamp(settings, changes);
+    getSettingsConstraints()->clamp(settings, changes);
 }

 std::shared_ptr<const SettingsConstraints> Context::getSettingsConstraints() const
--- a/src/Interpreters/InterpreterGrantQuery.cpp
+++ b/src/Interpreters/InterpreterGrantQuery.cpp
@ -93,24 +93,28 @@ namespace
        const AccessControlManager & access_control,
        const ContextAccess & access,
        const ASTGrantQuery & query,
-        const std::vector<UUID> & grantees_from_query)
+        const std::vector<UUID> & grantees_from_query,
+        bool & need_check_grantees_are_allowed)
    {
        const auto & elements = query.access_rights_elements;
+        need_check_grantees_are_allowed = true;
        if (elements.empty())
+        {
+            /// No access rights to grant or revoke.
+            need_check_grantees_are_allowed = false;
            return;
+        }

-        /// To execute the command GRANT the current user needs to have the access granted
-        /// with GRANT OPTION.
        if (!query.is_revoke)
        {
+            /// To execute the command GRANT the current user needs to have the access granted with GRANT OPTION.
            access.checkGrantOption(elements);
-            checkGranteesAreAllowed(access_control, access, grantees_from_query);
            return;
        }

        if (access.hasGrantOption(elements))
        {
-            checkGranteesAreAllowed(access_control, access, grantees_from_query);
+            /// Simple case: the current user has the grant option for all the access rights specified for REVOKE.
            return;
        }

@ -137,6 +141,7 @@ namespace
                all_granted_access.makeUnion(user->access);
            }
        }
+        need_check_grantees_are_allowed = false; /// already checked

        AccessRights required_access;
        if (elements[0].is_partial_revoke)
@ -158,21 +163,28 @@ namespace
        }
    }

-
    std::vector<UUID> getRoleIDsAndCheckAdminOption(
        const AccessControlManager & access_control,
        const ContextAccess & access,
        const ASTGrantQuery & query,
        const RolesOrUsersSet & roles_from_query,
-        const std::vector<UUID> & grantees_from_query)
+        const std::vector<UUID> & grantees_from_query,
+        bool & need_check_grantees_are_allowed)
    {
-        std::vector<UUID> matching_ids;
+        need_check_grantees_are_allowed = true;
+        if (roles_from_query.empty())
+        {
+            /// No roles to grant or revoke.
+            need_check_grantees_are_allowed = false;
+            return {};
+        }

+        std::vector<UUID> matching_ids;
        if (!query.is_revoke)
        {
+            /// To execute the command GRANT the current user needs to have the roles granted with ADMIN OPTION.
            matching_ids = roles_from_query.getMatchingIDs(access_control);
            access.checkAdminOption(matching_ids);
-            checkGranteesAreAllowed(access_control, access, grantees_from_query);
            return matching_ids;
        }

@ -181,7 +193,7 @@ namespace
            matching_ids = roles_from_query.getMatchingIDs();
            if (access.hasAdminOption(matching_ids))
            {
-                checkGranteesAreAllowed(access_control, access, grantees_from_query);
+                /// Simple case: the current user has the admin option for all the roles specified for REVOKE.
                return matching_ids;
            }
        }
@ -209,6 +221,7 @@ namespace
                all_granted_roles.makeUnion(user->granted_roles);
            }
        }
+        need_check_grantees_are_allowed = false; /// already checked

        const auto & all_granted_roles_set = query.admin_option ? all_granted_roles.getGrantedWithAdminOption() : all_granted_roles.getGranted();
        if (roles_from_query.all)
@ -218,6 +231,33 @@ namespace
        access.checkAdminOption(matching_ids);
        return matching_ids;
    }
+
+    void checkGrantOptionAndGrantees(
+        const AccessControlManager & access_control,
+        const ContextAccess & access,
+        const ASTGrantQuery & query,
+        const std::vector<UUID> & grantees_from_query)
+    {
+        bool need_check_grantees_are_allowed = true;
+        checkGrantOption(access_control, access, query, grantees_from_query, need_check_grantees_are_allowed);
+        if (need_check_grantees_are_allowed)
+            checkGranteesAreAllowed(access_control, access, grantees_from_query);
+    }
+
+    std::vector<UUID> getRoleIDsAndCheckAdminOptionAndGrantees(
+        const AccessControlManager & access_control,
+        const ContextAccess & access,
+        const ASTGrantQuery & query,
+        const RolesOrUsersSet & roles_from_query,
+        const std::vector<UUID> & grantees_from_query)
+    {
+        bool need_check_grantees_are_allowed = true;
+        auto role_ids = getRoleIDsAndCheckAdminOption(
+            access_control, access, query, roles_from_query, grantees_from_query, need_check_grantees_are_allowed);
+        if (need_check_grantees_are_allowed)
+            checkGranteesAreAllowed(access_control, access, grantees_from_query);
+        return role_ids;
+    }
 }


@ -243,7 +283,7 @@ BlockIO InterpreterGrantQuery::execute()
    /// Check if the current user has corresponding roles granted with admin option.
    std::vector<UUID> roles;
    if (roles_set)
-        roles = getRoleIDsAndCheckAdminOption(access_control, *getContext()->getAccess(), query, *roles_set, grantees);
+        roles = getRoleIDsAndCheckAdminOptionAndGrantees(access_control, *getContext()->getAccess(), query, *roles_set, grantees);

    if (!query.cluster.empty())
    {
@ -258,7 +298,7 @@ BlockIO InterpreterGrantQuery::execute()

    /// Check if the current user has corresponding access rights with grant option.
    if (!query.access_rights_elements.empty())
-        checkGrantOption(access_control, *getContext()->getAccess(), query, grantees);
+        checkGrantOptionAndGrantees(access_control, *getContext()->getAccess(), query, grantees);

    /// Update roles and users listed in `grantees`.
    auto update_func = [&](const AccessEntityPtr & entity) -> AccessEntityPtr
--- a/src/Interpreters/MergeJoin.cpp
+++ b/src/Interpreters/MergeJoin.cpp
@ -1048,7 +1048,10 @@ private:
            }

            if (rows_added >= max_block_size)
+            {
+                ++block_number;
                break;
+            }
        }

        return rows_added;
--- a/src/Processors/Formats/Impl/AvroRowOutputFormat.cpp
+++ b/src/Processors/Formats/Impl/AvroRowOutputFormat.cpp
@ -41,6 +41,7 @@
 #include <avro/ValidSchema.hh>
 #include <avro/Writer.hh>

+#include <re2/re2.h>

 namespace DB
 {
@ -48,8 +49,34 @@ namespace ErrorCodes
 {
    extern const int ILLEGAL_COLUMN;
    extern const int BAD_ARGUMENTS;
+    extern const int CANNOT_COMPILE_REGEXP;
 }

+class AvroSerializerTraits
+{
+public:
+    explicit AvroSerializerTraits(const FormatSettings & settings_)
+        : string_to_string_regexp(settings_.avro.string_column_pattern)
+    {
+        if (!string_to_string_regexp.ok())
+            throw DB::Exception(
+                "Avro: cannot compile re2: " + settings_.avro.string_column_pattern + ", error: " + string_to_string_regexp.error()
+                    + ". Look at https://github.com/google/re2/wiki/Syntax for reference.",
+                DB::ErrorCodes::CANNOT_COMPILE_REGEXP);
+    }
+
+    bool isStringAsString(const String & column_name)
+    {
+        return RE2::FullMatch(column_name, string_to_string_regexp);
+    }
+
+    ~AvroSerializerTraits() = default;
+
+private:
+    const RE2 string_to_string_regexp;
+};
+
+
 class OutputStreamWriteBufferAdapter : public avro::OutputStream
 {
 public:
@ -75,7 +102,7 @@ private:
 };


-AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeFn(DataTypePtr data_type, size_t & type_name_increment)
+AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeFn(DataTypePtr data_type, size_t & type_name_increment, const String & column_name)
 {
    ++type_name_increment;

@ -161,11 +188,20 @@ AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeF
            }};
        }
        case TypeIndex::String:
-            return {avro::BytesSchema(), [](const IColumn & column, size_t row_num, avro::Encoder & encoder)
-            {
-                const StringRef & s = assert_cast<const ColumnString &>(column).getDataAt(row_num);
-                encoder.encodeBytes(reinterpret_cast<const uint8_t *>(s.data), s.size);
-            }};
+            if (traits->isStringAsString(column_name))
+                return {avro::StringSchema(), [](const IColumn & column, size_t row_num, avro::Encoder & encoder)
+                    {
+                        const StringRef & s = assert_cast<const ColumnString &>(column).getDataAt(row_num);
+                        encoder.encodeString(s.toString());
+                    }
+                };
+            else
+                return {avro::BytesSchema(), [](const IColumn & column, size_t row_num, avro::Encoder & encoder)
+                    {
+                        const StringRef & s = assert_cast<const ColumnString &>(column).getDataAt(row_num);
+                        encoder.encodeBytes(reinterpret_cast<const uint8_t *>(s.data), s.size);
+                    }
+                };
        case TypeIndex::FixedString:
        {
            auto size = data_type->getSizeOfValueInMemory();
@ -223,7 +259,7 @@ AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeF
        case TypeIndex::Array:
        {
            const auto & array_type = assert_cast<const DataTypeArray &>(*data_type);
-            auto nested_mapping = createSchemaWithSerializeFn(array_type.getNestedType(), type_name_increment);
+            auto nested_mapping = createSchemaWithSerializeFn(array_type.getNestedType(), type_name_increment, column_name);
            auto schema = avro::ArraySchema(nested_mapping.schema);
            return {schema, [nested_mapping](const IColumn & column, size_t row_num, avro::Encoder & encoder)
            {
@ -249,7 +285,7 @@ AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeF
        case TypeIndex::Nullable:
        {
            auto nested_type = removeNullable(data_type);
-            auto nested_mapping = createSchemaWithSerializeFn(nested_type, type_name_increment);
+            auto nested_mapping = createSchemaWithSerializeFn(nested_type, type_name_increment, column_name);
            if (nested_type->getTypeId() == TypeIndex::Nothing)
            {
                return nested_mapping;
@ -278,7 +314,7 @@ AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeF
        case TypeIndex::LowCardinality:
        {
            const auto & nested_type = removeLowCardinality(data_type);
-            auto nested_mapping = createSchemaWithSerializeFn(nested_type, type_name_increment);
+            auto nested_mapping = createSchemaWithSerializeFn(nested_type, type_name_increment, column_name);
            return {nested_mapping.schema, [nested_mapping](const IColumn & column, size_t row_num, avro::Encoder & encoder)
            {
                const auto & col = assert_cast<const ColumnLowCardinality &>(column);
@ -294,7 +330,8 @@ AvroSerializer::SchemaWithSerializeFn AvroSerializer::createSchemaWithSerializeF
 }


-AvroSerializer::AvroSerializer(const ColumnsWithTypeAndName & columns)
+AvroSerializer::AvroSerializer(const ColumnsWithTypeAndName & columns, std::unique_ptr<AvroSerializerTraits> traits_)
+    : traits(std::move(traits_))
 {
    avro::RecordSchema record_schema("row");

@ -303,7 +340,7 @@ AvroSerializer::AvroSerializer(const ColumnsWithTypeAndName & columns)
    {
        try
        {
-            auto field_mapping = createSchemaWithSerializeFn(column.type, type_name_increment);
+            auto field_mapping = createSchemaWithSerializeFn(column.type, type_name_increment, column.name);
            serialize_fns.push_back(field_mapping.serialize);
            //TODO: verify name starts with A-Za-z_
            record_schema.addField(column.name, field_mapping.schema);
@ -314,7 +351,7 @@ AvroSerializer::AvroSerializer(const ColumnsWithTypeAndName & columns)
            throw;
        }
    }
-    schema.setSchema(record_schema);
+    valid_schema.setSchema(record_schema);
 }

 void AvroSerializer::serializeRow(const Columns & columns, size_t row_num, avro::Encoder & encoder)
@ -350,7 +387,7 @@ AvroRowOutputFormat::AvroRowOutputFormat(
    WriteBuffer & out_, const Block & header_, const RowOutputFormatParams & params_, const FormatSettings & settings_)
    : IRowOutputFormat(header_, out_, params_)
    , settings(settings_)
-    , serializer(header_.getColumnsWithTypeAndName())
+    , serializer(header_.getColumnsWithTypeAndName(), std::make_unique<AvroSerializerTraits>(settings))
    , file_writer(
        std::make_unique<OutputStreamWriteBufferAdapter>(out_),
        serializer.getSchema(),
--- a/src/Processors/Formats/Impl/AvroRowOutputFormat.h
+++ b/src/Processors/Formats/Impl/AvroRowOutputFormat.h
@ -18,11 +18,13 @@ namespace DB
 {
 class WriteBuffer;

+class AvroSerializerTraits;
+
 class AvroSerializer
 {
 public:
-    AvroSerializer(const ColumnsWithTypeAndName & columns);
-    const avro::ValidSchema & getSchema() const { return schema; }
+    AvroSerializer(const ColumnsWithTypeAndName & columns, std::unique_ptr<AvroSerializerTraits>);
+    const avro::ValidSchema & getSchema() const { return valid_schema; }
    void serializeRow(const Columns & columns, size_t row_num, avro::Encoder & encoder);

 private:
@ -34,10 +36,11 @@ private:
    };

    /// Type names for different complex types (e.g. enums, fixed strings) must be unique. We use simple incremental number to give them different names.
-    static SchemaWithSerializeFn createSchemaWithSerializeFn(DataTypePtr data_type, size_t & type_name_increment);
+    /*static*/ SchemaWithSerializeFn createSchemaWithSerializeFn(DataTypePtr data_type, size_t & type_name_increment, const String & column_name);

    std::vector<SerializeFn> serialize_fns;
-    avro::ValidSchema schema;
+    avro::ValidSchema valid_schema;
+    std::unique_ptr<AvroSerializerTraits> traits;
 };

 class AvroRowOutputFormat : public IRowOutputFormat
--- a/src/Processors/Transforms/JoiningTransform.cpp
+++ b/src/Processors/Transforms/JoiningTransform.cpp
@ -180,11 +180,9 @@ void JoiningTransform::transform(Chunk & chunk)
 Block JoiningTransform::readExecute(Chunk & chunk)
 {
    Block res;
-    // std::cerr << "=== Chunk rows " << chunk.getNumRows() << " cols " << chunk.getNumColumns() << std::endl;

    if (!not_processed)
    {
-        // std::cerr << "!not_processed " << std::endl;
        if (chunk.hasColumns())
            res = inputs.front().getHeader().cloneWithColumns(chunk.detachColumns());

@ -193,7 +191,6 @@ Block JoiningTransform::readExecute(Chunk & chunk)
    }
    else if (not_processed->empty()) /// There's not processed data inside expression.
    {
-        // std::cerr << "not_processed->empty() " << std::endl;
        if (chunk.hasColumns())
            res = inputs.front().getHeader().cloneWithColumns(chunk.detachColumns());

@ -202,12 +199,10 @@ Block JoiningTransform::readExecute(Chunk & chunk)
    }
    else
    {
-        // std::cerr << "not not_processed->empty() " << std::endl;
        res = std::move(not_processed->block);
        join->joinBlock(res, not_processed);
    }

-    // std::cerr << "Res block rows " << res.rows() << " cols " << res.columns() << std::endl;
    return res;
 }

--- a/src/Processors/Transforms/WindowTransform.h
+++ b/src/Processors/Transforms/WindowTransform.h
@ -139,7 +139,9 @@ public:
    }

    const Columns & inputAt(const RowNumber & x) const
-    { return const_cast<WindowTransform *>(this)->inputAt(x); }
+    {
+        return const_cast<WindowTransform *>(this)->inputAt(x);
+    }

    auto & blockAt(const uint64_t block_number)
    {
@ -149,13 +151,19 @@ public:
    }

    const auto & blockAt(const uint64_t block_number) const
-    { return const_cast<WindowTransform *>(this)->blockAt(block_number); }
+    {
+        return const_cast<WindowTransform *>(this)->blockAt(block_number);
+    }

    auto & blockAt(const RowNumber & x)
-    { return blockAt(x.block); }
+    {
+        return blockAt(x.block);
+    }

    const auto & blockAt(const RowNumber & x) const
-    { return const_cast<WindowTransform *>(this)->blockAt(x); }
+    {
+        return const_cast<WindowTransform *>(this)->blockAt(x);
+    }

    size_t blockRowsNumber(const RowNumber & x) const
    {
@ -225,10 +233,14 @@ public:
    }

    RowNumber blocksEnd() const
-    { return RowNumber{first_block_number + blocks.size(), 0}; }
+    {
+        return RowNumber{first_block_number + blocks.size(), 0};
+    }

    RowNumber blocksBegin() const
-    { return RowNumber{first_block_number, 0}; }
+    {
+        return RowNumber{first_block_number, 0};
+    }

 public:
    /*
--- a/src/Storages/System/StorageSystemSettings.cpp
+++ b/src/Storages/System/StorageSystemSettings.cpp
@ -40,8 +40,7 @@ void StorageSystemSettings::fillData(MutableColumns & res_columns, ContextPtr co

        Field min, max;
        bool read_only = false;
-        if (settings_constraints)
-            settings_constraints->get(setting_name, min, max, read_only);
+        settings_constraints->get(setting_name, min, max, read_only);

        /// These two columns can accept strings only.
        if (!min.isNull())
--- a/tests/integration/test_backward_compatibility/test_cte_distributed.py
+++ b/tests/integration/test_backward_compatibility/test_cte_distributed.py
@ -0,0 +1,54 @@
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+
+cluster = ClickHouseCluster(__file__, name="cte_distributed")
+node1 = cluster.add_instance('node1', with_zookeeper=False)
+node2 = cluster.add_instance('node2',
+                             with_zookeeper=False, image='yandex/clickhouse-server', tag='21.7.3.14', stay_alive=True,
+                             with_installed_binary=True)
+
+
+@pytest.fixture(scope="module")
+def start_cluster():
+    try:
+        cluster.start()
+        yield cluster
+
+    finally:
+        cluster.shutdown()
+
+
+
+def test_cte_distributed(start_cluster):
+    node2.query("""
+WITH
+    quantile(0.05)(cnt) as p05,
+    quantile(0.95)(cnt) as p95,
+    p95 - p05 as inter_percentile_range
+SELECT 
+    sum(cnt) as total_requests,
+    count() as data_points,
+    inter_percentile_range
+FROM (
+    SELECT
+        count() as cnt
+    FROM remote('node{1,2}', numbers(10))
+    GROUP BY number
+)""")
+
+    node1.query("""
+WITH
+    quantile(0.05)(cnt) as p05,
+    quantile(0.95)(cnt) as p95,
+    p95 - p05 as inter_percentile_range
+SELECT 
+    sum(cnt) as total_requests,
+    count() as data_points,
+    inter_percentile_range
+FROM (
+    SELECT
+        count() as cnt
+    FROM remote('node{1,2}', numbers(10))
+    GROUP BY number
+)""")
--- a/tests/integration/test_create_user_and_login/test.py
+++ b/tests/integration/test_create_user_and_login/test.py
@ -1,5 +1,8 @@
 import pytest
+import time
+import logging
 from helpers.cluster import ClickHouseCluster
+from helpers.test_tools import assert_eq_with_retry

 cluster = ClickHouseCluster(__file__)
 instance = cluster.add_instance('instance')
@ -38,3 +41,46 @@ def test_grant_create_user():
    instance.query("GRANT CREATE USER ON *.* TO A")
    instance.query("CREATE USER B", user='A')
    assert instance.query("SELECT 1", user='B') == "1\n"
+
+
+def test_login_as_dropped_user():
+    for _ in range(0, 2):
+        instance.query("CREATE USER A")
+        assert instance.query("SELECT 1", user='A') == "1\n"
+
+        instance.query("DROP USER A")
+        expected_error = "no user with such name"
+        assert expected_error in instance.query_and_get_error("SELECT 1", user='A')
+
+
+def test_login_as_dropped_user_xml():
+    for _ in range(0, 2):
+        instance.exec_in_container(["bash", "-c" , """
+            cat > /etc/clickhouse-server/users.d/user_c.xml << EOF
+<?xml version="1.0"?>
+<yandex>
+    <users>
+        <C>
+            <no_password/>
+        </C>
+    </users>
+</yandex>
+EOF"""])
+
+        assert_eq_with_retry(instance, "SELECT name FROM system.users WHERE name='C'", "C")
+
+        instance.exec_in_container(["bash", "-c" , "rm /etc/clickhouse-server/users.d/user_c.xml"])
+
+        expected_error = "no user with such name"
+        while True:
+            out, err = instance.query_and_get_answer_with_error("SELECT 1", user='C')
+            if expected_error in err:
+                logging.debug(f"Got error '{expected_error}' just as expected")
+                break
+            if out == "1\n":
+                logging.debug(f"Got output '1', retrying...")
+                time.sleep(0.5)
+                continue
+            raise Exception(f"Expected either output '1' or error '{expected_error}', got output={out} and error={err}")
+            
+        assert instance.query("SELECT name FROM system.users WHERE name='C'") == ""
--- a/tests/queries/0_stateless/00965_shard_unresolvable_addresses.sql
+++ b/tests/queries/0_stateless/00965_shard_unresolvable_addresses.sql
@ -1,2 +1,2 @@
-SELECT count() FROM remote('127.0.0.1,localhos', system.one); -- { serverError 279 }
+SELECT count() FROM remote('127.0.0.1,localhos', system.one); -- { serverError 198 }
 SELECT count() FROM remote('127.0.0.1|localhos', system.one);
--- a/tests/queries/0_stateless/01060_avro.reference
+++ b/tests/queries/0_stateless/01060_avro.reference
@ -58,3 +58,9 @@ not found
 0
 1000
 147
+= string column pattern
+"русская строка"
+Ok
+1	0
+1	1
+1	1
--- a/tests/queries/0_stateless/01060_avro.sh
+++ b/tests/queries/0_stateless/01060_avro.sh
@ -89,3 +89,22 @@ ${CLICKHOUSE_LOCAL} -q "select toInt64(number) as a from numbers(1000)  format A

 # type supported via conversion
 ${CLICKHOUSE_LOCAL}  -q "select toInt16(123) as a format Avro" | wc -c | tr -d ' '
+
+echo '=' string column pattern
+${CLICKHOUSE_LOCAL} -q "select 'русская строка' as a  format Avro SETTINGS output_format_avro_string_column_pattern = 'a'" | ${CLICKHOUSE_LOCAL} --input-format Avro --output-format CSV -S "a String" -q 'select * from table'
+
+# it is expected that invalid UTF-8 can be created
+${CLICKHOUSE_LOCAL} -q "select '\x61\xF0\x80\x80\x80b' as a  format Avro" > /dev/null && echo Ok
+
+A_NEEDLE="'\"name\":\"a\",\"type\":\"string\"'"
+B_NEEDLE="'\"name\":\"b\",\"type\":\"string\"'"
+PATTERNQUERY="select 'русская строка' as a, 'русская строка' as b format Avro SETTINGS output_format_avro_string_column_pattern ="
+
+PATTERNPATTERN="'a'"
+${CLICKHOUSE_LOCAL} -q "$PATTERNQUERY $PATTERNPATTERN" | tr -d '\n' | ${CLICKHOUSE_LOCAL} --structure "avro_raw String" --input-format LineAsString  -q "select countSubstrings(avro_raw, $A_NEEDLE), countSubstrings(avro_raw, $B_NEEDLE) from table"
+
+PATTERNPATTERN="'a|b'"
+${CLICKHOUSE_LOCAL} -q "$PATTERNQUERY $PATTERNPATTERN" | tr -d '\n' | ${CLICKHOUSE_LOCAL} --structure "avro_raw String" --input-format LineAsString  -q "select countSubstrings(avro_raw, $A_NEEDLE), countSubstrings(avro_raw, $B_NEEDLE) from table"
+
+PATTERNPATTERN="'.*'"
+${CLICKHOUSE_LOCAL} -q "$PATTERNQUERY $PATTERNPATTERN" | tr -d '\n' | ${CLICKHOUSE_LOCAL} --structure "avro_raw String" --input-format LineAsString  -q "select countSubstrings(avro_raw, $A_NEEDLE), countSubstrings(avro_raw, $B_NEEDLE) from table"
--- a/tests/queries/0_stateless/01943_pmj_non_joined_stuck.reference
+++ b/tests/queries/0_stateless/01943_pmj_non_joined_stuck.reference
@ -0,0 +1,16 @@
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
--- a/tests/queries/0_stateless/01943_pmj_non_joined_stuck.sql
+++ b/tests/queries/0_stateless/01943_pmj_non_joined_stuck.sql
@ -0,0 +1,19 @@
+SET max_block_size = 6, join_algorithm = 'partial_merge';
+
+SELECT count() == 4  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2]) AS s) AS js2 USING (s);
+SELECT count() == 5  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2]) AS s) AS js2 USING (s);
+SELECT count() == 6  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2]) AS s) AS js2 USING (s);
+SELECT count() == 7  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2]) AS s) AS js2 USING (s);
+SELECT count() == 8  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3]) AS s) AS js2 USING (s);
+SELECT count() == 9  FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 10 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 11 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 12 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 13 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 14 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 15 FROM (SELECT 1 AS s) AS js1 ALL RIGHT JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3]) AS s) AS js2 USING (s);
+
+SELECT count() == 8  FROM (SELECT 1 AS s) AS js1 FULL JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2]) AS s) AS js2 USING (s);
+SELECT count() == 9  FROM (SELECT 1 AS s) AS js1 FULL JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3]) AS s) AS js2 USING (s);
+SELECT count() == 10 FROM (SELECT 1 AS s) AS js1 FULL JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3]) AS s) AS js2 USING (s);
+SELECT count() == 11 FROM (SELECT 1 AS s) AS js1 FULL JOIN (SELECT arrayJoin([2, 2, 2, 2, 2, 2, 2, 3, 3, 3]) AS s) AS js2 USING (s);
--- a/tests/queries/0_stateless/01946_test_wrong_host_name_access.reference
+++ b/tests/queries/0_stateless/01946_test_wrong_host_name_access.reference
@ -0,0 +1,2 @@
+1
+2
--- a/tests/queries/0_stateless/01946_test_wrong_host_name_access.sh
+++ b/tests/queries/0_stateless/01946_test_wrong_host_name_access.sh
@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+MYHOSTNAME=$(hostname -f)
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+${CLICKHOUSE_CLIENT} --multiquery --query "
+    DROP USER IF EXISTS dns_fail_1, dns_fail_2;
+    CREATE USER dns_fail_1 HOST NAME 'non.existing.host.name', '${MYHOSTNAME}';
+    CREATE USER dns_fail_2 HOST NAME '${MYHOSTNAME}', 'non.existing.host.name';"
+
+${CLICKHOUSE_CLIENT} --query "SELECT 1" --user dns_fail_1 --host ${MYHOSTNAME}
+
+${CLICKHOUSE_CLIENT} --query "SELECT 2" --user dns_fail_2 --host ${MYHOSTNAME}
+
+${CLICKHOUSE_CLIENT} --query "DROP USER IF EXISTS dns_fail_1, dns_fail_2"
--- a/tests/queries/skip_list.json
+++ b/tests/queries/skip_list.json
@ -514,6 +514,7 @@
        "01915_create_or_replace_dictionary",
        "01925_test_storage_merge_aliases",
        "01933_client_replxx_convert_history", /// Uses non unique history file
-        "01902_table_function_merge_db_repr"
+        "01902_table_function_merge_db_repr",
+        "01946_test_wrong_host_name_access"
    ]
 }
--- a/utils/list-versions/version_date.tsv
+++ b/utils/list-versions/version_date.tsv
@ -1,5 +1,6 @@
 v21.7.3.14-stable	2021-07-13
 v21.7.2.7-stable	2021-07-09
+v21.6.8.62-stable	2021-07-13
 v21.6.7.57-stable	2021-07-09
 v21.6.6.51-stable	2021-07-02
 v21.6.5.37-stable	2021-06-19